5. The N pole faces of two cylindrical neodynium magnets having a radius of0.5 cm and a length of 20 cm are brought together so that their faces are paralleland there is a small gap between them. The magnetic surface charge density oneach pole face is 2 x 10° Cm's. (a) What is the force between the magnetsin the limit in which the gap goes to zero? -Assume that the magnets are muchlonger than shown in the figure below, so that you only need to concern yourselfwith the repulsion between N and N. (b) What is the force between the magnetswhen they are separated by 0.5 m? At this separation you can approximate thefour pole faces as point-charges. N%24

This problem can be solved using the analogy with electric charge formulas.

Answered: 5. The N pole faces of two cylindrical…

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